They just love com­pli­ca­ting sim­ple things. Fol­lo­wing is sto­len from http://​forum​.xda​-deve​lo​pers​.com/​s​h​o​w​t​h​r​e​a​d​.​p​h​p​?​t​=​2​3​0​3​046

The steps to install a unsi­gned dri­ver on win­dows 8 is as follows.

1. From win­dows 8 con­trol panel cho­ose Gene­ral –> Under “Advan­ced Star­tup” –> Restart now.

Now the sys­tem will restart and might take some minu­tes to show up the boot menu. Wait for It patiently.

After some time you will be promp­ted with a menu with fol­lo­wing options.

1. Con­ti­nue

2. Tro­uble­sho­ot

3. Turn off

Cho­ose Troubleshoot

Then the fol­lo­wing menu appears.

Refresh your PC Reset your PC Advan­ced Options Cho­ose Advan­ced Options

Then the fol­lo­wing menu appears

Sys­tem Resto­re Sys­tem Ima­ge Reco­ve­ry Auto­ma­tic Repa­ir Com­mand Prompt Win­dows Star­tup set­tings Cho­ose Win­dows Star­tup Set­tings, then Click Restart.

Now the com­pu­ter will restart and the boot menu appe­ars. Cho­ose “Disa­ble Dri­ver signa­tu­re Enfor­ce­ment” from the menu. Now win­dows will start and you can do the instal­la­tion of the dri­ver that is not signed.